28302975 has 18 divisors (see below), whose sum is σ = 50694176. Its totient is φ = 15094800.

The previous prime is 28302971. The next prime is 28302983. The reversal of 28302975 is 57920382.

It is a happy number.

It is not a de Polignac number, because 28302975 - 2² = 28302971 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28302971) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 62671 + ... + 63120.

Almost surely, 2^28302975 is an apocalyptic number.

28302975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28302975 is a deficient number, since it is larger than the sum of its proper divisors (22391201).

28302975 is a wasteful number, since it uses less digits than its factorization.

28302975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125807 (or 125799 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 28302975 is about 5320.0540410789. The cubic root of 28302975 is about 304.7502210128.

The spelling of 28302975 in words is "twenty-eight million, three hundred two thousand, nine hundred seventy-five".